MK-I MK-II MK-III MK-IV GULF MIRAGE J-CAR LOLA
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Why not start with your first post today and become an active part of GT40s.com now! And, if you find you enjoy GT40s.com think about becoming a Forum Supporter. | | GT40 Tech - Engines/Induction/Exhaust Motors and engine related - right here! | 
11-01-08, 06:04 PM
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#1 (permalink)
| | GHP Bronze Supporter 
Join Date: Dec 2006 Location: Appleton, Wisconsin GT40: building 2 SPF GT40's
Posts: 53
Rep Power: 3  | "M" Engine Casting Code
Sorry,
Not GT 40 related, but too many experts here that will know the answer. Since SPF 2174 and 2175 are complete, I moved on to another project I had waiting, a 1966 Sunbeam Tiger. The car needed some chassis work so I removed the engine to freshen it up a bit. The owner knew the engine was not the original 260, but I think he thought it was a replacement 260. As I was tearing the engine down, something did not make sense with the 302 casting numbers in the valley, checked bore and it was 4.00 not the 3.80 of a 260. I then decided to check the engine casting to see what I had. The casting code is a C8AM. I have decoded this as a 1968 Motor, from the SVO devision!! What does the "M" code really mean? | 
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11-01-08, 06:13 PM
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#2 (permalink)
| | JIMMYMAC Lifetime Premier Supporter 
Join Date: Jul 2003 Location: Scotland
Posts: 994
Rep Power: 17 | Re: "M" Engine Casting Code
1968 Mexico 302 ?
__________________
Cordially,
James
MKI monocoque. XE' 289 short blocks, C6FE heads, Webers, ZF
Graviner Fire Suppression | |
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11-01-08, 06:21 PM
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#3 (permalink)
| | molleur 3 Tenths
Join Date: Mar 2008 Location: Florida GT40: SL-C LS1/930LSD
Posts: 382
Rep Power: 4 | Re: "M" Engine Casting Code
I believe the engine casting C8AM indicates 1968 Ford, M = Performance Operations SVO Service Parts. | |
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11-01-08, 06:56 PM
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#4 (permalink)
| | GHP Bronze Supporter
Join Date: Dec 2006 Location: Appleton, Wisconsin GT40: building 2 SPF GT40's
Posts: 53
Rep Power: 3 | Re: "M" Engine Casting Code
Yes everything I read notes that it came out of the SVO devision. Not sure if this points to nothing more than a late 60's crate motor or is there something special about this block? | |
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11-01-08, 07:06 PM
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#5 (permalink)
| | JIMMYMAC Lifetime Premier Supporter
Join Date: Jul 2003 Location: Scotland
Posts: 994
Rep Power: 17 | Re: "M" Engine Casting Code
I thought that Ford set up the SVO Division in the early 1980s
__________________
Cordially,
James
MKI monocoque. XE' 289 short blocks, C6FE heads, Webers, ZF
Graviner Fire Suppression | |
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11-01-08, 07:17 PM
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#6 (permalink)
| | jac mac 10 tenths 
Join Date: Dec 2005 Location: Gore N.Z.
Posts: 1,760
Rep Power: 23 | Re: "M" Engine Casting Code
This is a Mexico block, Nothing to do with SVO. To ID from outside the C8AM -- is in slightly smaller letter size than USA blocks, there should be two forward facing undrilled stud bosses below # 1 cyl @ front of block, threaded hole for oil pickup stay beside center main & 'Made En Mexico' cast in valley above cam tunnels. Some say they are stronger- metal is different when you bore them-doesnt machine the same.
__________________
Jac Mac,
DIY Mono MkIV,390,J44,15" Turbines.
Last edited by jac mac; 11-01-08 at 07:19 PM.
Reason: How did that -6-- get there:)
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11-01-08, 07:21 PM
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#7 (permalink)
| | JIMMYMAC Lifetime Premier Supporter
Join Date: Jul 2003 Location: Scotland
Posts: 994
Rep Power: 17 | Re: "M" Engine Casting Code
"Hecho en Mexico" in the valley
__________________
Cordially,
James
MKI monocoque. XE' 289 short blocks, C6FE heads, Webers, ZF
Graviner Fire Suppression | |
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11-01-08, 07:24 PM
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#8 (permalink)
| | jac mac 10 tenths
Join Date: Dec 2005 Location: Gore N.Z.
Posts: 1,760
Rep Power: 23 | Re: "M" Engine Casting Code
Knew I should have looked at that spelling more carefully, didnt want to get my hands dirty!! 
__________________
Jac Mac,
DIY Mono MkIV,390,J44,15" Turbines.
Last edited by jac mac; 11-01-08 at 07:24 PM.
Reason: cant spell myself!!
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11-01-08, 07:26 PM
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#9 (permalink)
| | molleur 3 Tenths
Join Date: Mar 2008 Location: Florida GT40: SL-C LS1/930LSD
Posts: 382
Rep Power: 4 | Re: "M" Engine Casting Code
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11-01-08, 07:28 PM
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#10 (permalink)
| | molleur 3 Tenths
Join Date: Mar 2008 Location: Florida GT40: SL-C LS1/930LSD
Posts: 382
Rep Power: 4 | Re: "M" Engine Casting Code
I would go with the info from JimmyMac. much more detailed. | |
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11-01-08, 07:45 PM
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#11 (permalink)
| | GHP Bronze Supporter
Join Date: Dec 2006 Location: Appleton, Wisconsin GT40: building 2 SPF GT40's
Posts: 53
Rep Power: 3 | Re: "M" Engine Casting Code
Jimmy Mac has it right!!! Amazing how much info noted that "M" as a SVO code, but it clearly has the Made in Mexico in the valley. Jac Mac knows his stuff! Thanks for all your help! | |
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11-01-08, 07:49 PM
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#12 (permalink)
| | molleur 3 Tenths
Join Date: Mar 2008 Location: Florida GT40: SL-C LS1/930LSD
Posts: 382
Rep Power: 4 | Re: "M" Engine Casting Code
Super, glad that was resolved. lots of knowledge here! this is such a great forum! | |
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11-01-08, 08:25 PM
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#13 (permalink)
| | GHP Bronze Supporter
Join Date: Dec 2006 Location: Appleton, Wisconsin GT40: building 2 SPF GT40's
Posts: 53
Rep Power: 3 | Re: "M" Engine Casting Code
Agreed!! JAC MAC had it right in every way! | |
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11-02-08, 02:04 AM
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#14 (permalink)
| | A.J. 2 Tenths
Join Date: Mar 2008 Location: Cheshire,CT GT40: RCR
Posts: 211
Rep Power: 3 | Re: "M" Engine Casting Code
Jac - you have a PM. AJ | |
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11-02-08, 08:08 AM
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#15 (permalink)
| | JIMMYMAC Lifetime Premier Supporter
Join Date: Jul 2003 Location: Scotland
Posts: 994
Rep Power: 17 | Re: "M" Engine Casting Code
__________________
Cordially,
James
MKI monocoque. XE' 289 short blocks, C6FE heads, Webers, ZF
Graviner Fire Suppression | |
| | |
11-02-08, 11:18 AM
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#16 (permalink)
| | sfm6s Rookie
Join Date: Jan 2005 Location: uk
Posts: 97
Rep Power: 4 | Re: "M" Engine Casting Code
The other notable benefit of these blocks (Mexican) is that they have heavy duty main caps, same as the hipo block. | |
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11-02-08, 11:57 AM
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#17 (permalink)
| | JIMMYMAC Lifetime Premier Supporter
Join Date: Jul 2003 Location: Scotland
Posts: 994
Rep Power: 17 | Re: "M" Engine Casting Code
Agree,
Standard 289 cap on the left. Original 289 HiPo cap on the right.
The Mexico version is similar.
__________________
Cordially,
James
MKI monocoque. XE' 289 short blocks, C6FE heads, Webers, ZF
Graviner Fire Suppression | |
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